Marcus is in his sixth year with Hitters Baseball Academy. His experience includes playing for 11 seasons in the minor leagues for Pittsburgh, Atlanta and Arizona. He was selected in the 18th round of the 1989 draft by the Pirates. He joined the Brewers after retiring as an active player in 1999 and is in his ninth season as the Brewers' bullpen catcher. A native Wisconsinite, he graduated from Racine Horlick High School in 1989 lettering in both baseball and basketball. He has a charitable organization called "Koos For Kids" , which helps terminally ill and disadvantaged children in Southeastern Wisconsin.